反应详情

A solution of lithium tri-sec-butylborohydride in tetrahydrofuran (1.06 M, 0.178 mL, 0.189 mmol) was added to a solution of 1-(4-{1-ethyl-1-[4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-propyl}-2-methyl-phenoxy)-3,3-dimethyl-butan-2-one (Example 143-(4); 75.2 mg, 0.157 mmol) in tetrahydrofuran (3 mL) at −78° C., and the mixture was stirred for 30 minutes. The reaction mixture was then poured into a saturated aqueous sodium bicarbonate solution, followed by extraction with dichloromethane. The organic layer was dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure. The resulting residue was purified by silica gel chromatography (hexane:ethyl acetate=2:1) to give the target compound as a colorless oil (46.6 mg, 62%).

1. extractionfollowed by extraction with dichloromethane
2. dry with materialThe organic layer was dried over anhydrous magnesium sulfate
3. filtrationfiltered
4. concentrationconcentrated under reduced pressure
5. customThe resulting residue was purified by silica gel chromatography (hexane:ethyl acetate=2:1)